linux-kernel - Re: [PATCH v2 04/12] drm/rockchip: vop2: clear afbc en and transform bit for cluster window at linear mode

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Message-ID: <20231127140439.GE977968@pengutronix.de>
Date:   Mon, 27 Nov 2023 15:04:39 +0100
From:   Sascha Hauer <s.hauer@...gutronix.de>
To:     Andy Yan <andyshrk@....com>
Cc:     heiko@...ech.de, hjc@...k-chips.com,
        dri-devel@...ts.freedesktop.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        krzysztof.kozlowski+dt@...aro.org, robh+dt@...nel.org,
        devicetree@...r.kernel.org, sebastian.reichel@...labora.com,
        kever.yang@...k-chips.com, chris.obbard@...labora.com,
        Andy Yan <andy.yan@...k-chips.com>
Subject: Re: [PATCH v2 04/12] drm/rockchip: vop2: clear afbc en and transform
 bit for cluster window at linear mode

On Wed, Nov 22, 2023 at 08:54:25PM +0800, Andy Yan wrote:
> From: Andy Yan <andy.yan@...k-chips.com>
> 
> The enable bit and transform offset of cluster windows should be
> cleared when it work at linear mode, or we may have a iommu fault
> issue.
> 
> Signed-off-by: Andy Yan <andy.yan@...k-chips.com>

Reviewed-by: Sascha Hauer <s.hauer@...gutronix.de>

Sascha

> ---
> 
> (no changes since v1)
> 
>  drivers/gpu/drm/rockchip/rockchip_drm_vop2.c | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> index 639dfebc6bd1..a019cc9bbd54 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop2.c
> @@ -1312,6 +1312,11 @@ static void vop2_plane_atomic_update(struct drm_plane *plane,
>  		vop2_win_write(win, VOP2_WIN_AFBC_ROTATE_270, rotate_270);
>  		vop2_win_write(win, VOP2_WIN_AFBC_ROTATE_90, rotate_90);
>  	} else {
> +		if (vop2_cluster_window(win)) {
> +			vop2_win_write(win, VOP2_WIN_AFBC_ENABLE, 0);
> +			vop2_win_write(win, VOP2_WIN_AFBC_TRANSFORM_OFFSET, 0);
> +		}
> +
>  		vop2_win_write(win, VOP2_WIN_YRGB_VIR, DIV_ROUND_UP(fb->pitches[0], 4));
>  	}
>  
> -- 
> 2.34.1
> 
> 
> 

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